Marin Mersenne 2^P-1
Username
Password
Forgot password?
Blue
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
6449099Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 272
TF target 266
P-1
B1 = 4000000
B2 = 18004726740
ECM
DigitsB1Curves
2550000106 / 280
Estimated T-Level: 21.9 ⓘ
LL
StatusDateUserResidueShift
Verified1999-05-02Stephen Wood1F1FB3E7285AC68C4149490
Verified2001-04-21Chris1F1FB3E7285AC68C2106135
History
DateUserTypeResult
2023-05-17linamentNF-PM1
B1=4000000, B2=18004726740
2023-05-16linamentNF-PM1
B1=3999900
2022-01-03Architects CubedNF-PM1
B1=1000000, B2=385713900
2021-09-21SRBaseNF
no factor from 2^71 to 2^72
2021-08-11SRBaseNF
no factor from 2^70 to 2^71
2021-03-06takahashiNF
no factor from 2^69 to 2^70
2020-05-19takahashiNF
no factor from 2^68 to 2^69
2018-06-06ramgeisNF
no factor from 2^67 to 2^68
2016-04-08Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-10-24snme2pm1NF
no factor from 2^65 to 2^66
2014-09-28NesowaNF-PM1
B1=395000, B2=9973750, E=12
2014-08-05lycornNF
no factor from 2^64 to 2^65
2014-08-02NesowaNF
no factor from 2^63 to 2^64
2009-06-22Carsten KossendeyNF-PM1
B1=35000, B2=498750